Hello, as the title suggests, my zj with +230k miles on it has developed a whine under the hood, it almost sounds like a blower making boost. I first noticed it on my drive this morning and got a little worried, at a red light I shifted into neutral and pressed on the gas to determine if it was in the trans or in the engine. After I determined that it was not the trans I proceeded to stop in a parking lot to see if I could identify it. It appears to be coming from one of the accessory dives or an idler on the passenger side, and the power steering is not only on the other side but is not low on fluid, as for the water pump, I replaced that just over a year ago. That leaves the compressor, an idler, or the alternator. Im getting 14 volts at the battery when running to the alternator charges, and the ac still blows cold as Dainties ninth circle of hell, and hot as the internal depths of the planet. any ideas as to what it could be? anything would be a help.